"A 20-month Dayton Daily News examination found that the United States government failed to reveal the full truth about the deaths of at least 10 Peace Corps volunteers who died over a 30-year period.

"I personally never believed them when they said it was an accidental death," said Ronda Thorne, who learned through records obtained by the Daily News that her brother, 25-year-old Jerry Dean Bryan of Spokane, Wash., had a history of alcohol and drug abuse before he died of a barbiturate overdose in Brazil in 1978. "